Extend Over Time
Evaluation of a professional development program should extend over time in order to accurately depict the amount and depth of change in teaching practice and the result in student performance. Fullan (1985) notes the importance of time in determining change:
"Studies that trace change over a period of time (even short periods) are essential to inferring how people change. Research needs to go beyond theories of change (what factors explain change) to theories of changing (how change occurs, and how to use this new knowledge)." (p. 392)
